Add JSON functionality to Utils

We want to be able to generate JSON files, and such functionality is not available in base or other boot libraries. I have copied the minal implementation from https://hackage.haskell.org/package/ghc-9.4.4/docs/GHC-Utils-Json.html

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• f29d68a2 - Format with ormolu

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• f29d68a2...43e4db5f - 3 commits from branch hpc:master
• 8390fb17 - Merge

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